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Chris (aka-Moose)
Chris (aka-Moose), Technician
Category: Car
Satisfied Customers: 1176
Experience:  16 years of experience
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Car idles very rough when first started for the

Customer Question

car idles very rough when first started for the day...anything that I need to check/change/fix, and how do I do it please?...2005 Aztek v6
Submitted: 12 days ago.
Category: Car
Expert:  Gunvir Singh replied 12 days ago.

Hello, is the check engine light on?

Customer: replied 12 days ago.
no, no check engine light
Expert:  Gunvir Singh replied 12 days ago.

Do you smell any foul smell from the exhaust when it runs rough?

Customer: replied 12 days ago.
there was a very stinking smell a day ago, much like rotted meat...
Customer: replied 12 days ago.
but that was inside of car
Customer: replied 12 days ago.
never smelled that before...smelled so rank my son sprayed air freshener in car
Expert:  Gunvir Singh replied 12 days ago.

How long does it run rough after you start it?

Customer: replied 12 days ago.
just a few minutes
Customer: replied 12 days ago.
then it seems to smooth out
Expert:  Gunvir Singh replied 12 days ago.

Is your coolant level getting low?

Customer: replied 12 days ago.
sorry for delay in response...went to auto parts store and had them check for codes which showed no codes...plus car started and idled fine like it's suppose to, this time...no rough idle...
coolant is good as well...
Expert:  Gunvir Singh replied 12 days ago.

No problem, one more question. Does the issue occur if it sits for 2-4 hours or longer period of time?

Customer: replied 10 days ago.
no sir, just first start in the mornings
Expert:  Gunvir Singh replied 9 days ago.

When was the last time tune up was done?

Customer: replied 9 days ago.
last week
Expert:  Gunvir Singh replied 9 days ago.

Was this issue present before tune up was done?

Customer: replied 8 days ago.
Expert:  Gunvir Singh replied 8 days ago.

The symptoms you are experiencing points towards a contamination in the cylinder when the vehicle sits for a while. Most common causes for that on this vehicle is a leaking fuel pressure regulator, leaking fuel injector or internally leaking intake manifold gaskets.

Customer: replied 7 days ago.
ok...car did idle a little rough after it set a couple hours yesterday, but it eventually cleared up...it has been checked a couple times for possible gases caused by a cracked head or a manifold gasket leak and showed no signs of gasses...where is the fuel pressure regulator located?...
Expert:  Gunvir Singh replied 7 days ago.

It is located on the fuel return pipe.

Customer: replied 7 days ago.
how do I check/test this fuel pressure regulator
Expert:  Gunvir Singh replied 7 days ago.

You will need a a fuel pressure guage. When you turn on the ignition it will show you the fuel pressure, see if the fuel pressure drops fast when ignition is turned off. Also check if there is gasoline present in the fuel pressure regulator vacuum hose. That indicates a leaking fuel pressure regulator.

Customer: replied 3 days ago.
where is fuel pressure vacuum hose and how do I check to see if gas is present in it...
Expert:  Gunvir Singh replied 2 days ago.

I will opt ot and let another expert assist you.